JPS5824836B2 - Kasainadonotsuhousouchi - Google Patents

Description

[Detailed Description of the Invention] The present invention includes a plurality of signal lines that sequentially pass through a plurality of guarded areas and reach a receiver. This invention relates to a notification device for fires, etc., which requires fewer signal lines and is configured to select main lines and send signals from transmitters installed in each area to receivers through the selected lines.

This type of reporting device is equipped with a transmitter equipped with a transmitting relay with a short operating time that provides a signal through a make contact for one or more signal lines selected in each warning area, and The machine is equipped with a district relay selection circuit which is operated not only by the individual operation of the receiving relays connected to each signal line but also by a combination of their operations, through which the district relays in the fire operation area are operated, A device is known that displays a fire by self-maintaining this device (see Japanese Patent Publication No. 42-22980). Since the number of tracks is not limited, there is a risk of malfunction due to noise, and fires may occur in different areas at the same time, or fires may occur in one place if such a device is installed in a road tunnel. If fire detectors in different areas are simultaneously illuminated by the light of the fire alarm, and transmitters in multiple areas operate at the same time, the combinations of signal lines that receive signals at the same time may differ from the combinations corresponding to those areas. Therefore, there was a drawback that a completely different area from those areas was displayed on the receiver.

This invention has a simple configuration, so there is less risk of malfunction due to noise, and even when transmitters in multiple areas operate at the same time, the area where the transmitter has operated can be displayed without error. The purpose of this invention is to obtain a reporting device, and the present invention will be explained below with reference to embodiments shown in the drawings.

FIG. 1 and FIG. 2 are circuit diagrams showing an embodiment of the present invention divided into two parts.

In Fig. 1, L1 to L4, Lp, and Lq are signal lines and power lines that pass sequentially through a plurality of guarded areas, both of which enter the receiver Re, and the former serve as respective receiving elements. The latter are connected to the positive terminal of the power source E via resistors R0 to R4, and the latter are connected to the positive and negative terminals of the power source E, respectively.

A, ~A6 are transmitters installed in each warning area, and in each transmitter, relaxation oscillators O81~O86 composed of a PUT, a capacitor, and a resistor are used as make contacts D1~D6 of a fire detector or manual alarm. Through the positive and negative power lines Lp
, Lq, and whose conduction is controlled by each oscillator O8, to O86 is a negative power supply line Lq.
and two lines selected in different combinations from among the four signal lines L1 to L4 for each area are connected through a diode D for backflow prevention.

Next, in the receiver Re, the collectors of transistors Tr and Tr4 whose bases and emitters are connected to both ends of resistors R1 to R4 connected to each signal line L1 to L4 are connected to the power source E through load resistors r1 to r4, respectively. It is connected to the negative terminal, and the output line I! is connected to the upper end of the resistors r1 to r4, respectively.
1 to 14 are connected.

Fig. 2 shows resistors R1 to R4 in Fig. 1 in response to signals sent from transmitters A1 to A6 through signal lines L1 to L4.
Due to the voltage drop appearing in the transistors Tr1 to T
This is a district selection circuit that selects which district's transmitter is activated when r4 conducts, and the signal lines are output lines 11 to 14.
In order to show the relationship between Ll and power source E, only a portion of Ll and L2 is shown.

G1-G6 are AND circuits having two input terminals, each of which is provided corresponding to the transmitters A1-A6, and these input terminals are connected to the signal line L1 selected in the area where the transmitters A, ~A6 are installed. It is connected to the output lines 111!2, 1118 to 1311 corresponding to the combination of ~L4, and those output terminals are connected to the input terminal of the inhibition circuit α~.
The ≦ output terminals are connected to the negative terminal of the power source E through district relays N1 to N6 provided with self-holding make contacts n1 to n6.

g1 to g4 are AND circuits with three input terminals provided in order to display the area where the transmitter worked without error even when multiple transmitters A and ~A6 operate at the same time.
Those input terminals are connected to all the different combinations addressed to three of the four output lines 11 to 14, and those output terminals are connected to all the inhibition circuits G (to G6 inhibition) at once. connected to the input terminal.

For example, if a fire breaks out in the area where transmitter A is installed and the make contact of the fire detector or manual alarm A1 is closed, the oscillator O8 is activated and the signal line L1. Glue in Figure 3(a) to L2.

A pulse current as shown in L2 flows, and the transistors Tr1. Tr2 is shown in Figure 3(b)
Simultaneously and intermittently as shown in Trl t Tr2;
Since conduction occurs and output voltages corresponding to the currents of Trl and Tr2 are generated in the output lines 11 and 12, the gate circuit G1゜G'1
G1+GG4 (as shown in FIG. 3(c)) conducts together, and the district relay N1 operates to maintain itself, indicating the district where the transmitter A1 is located.

Next, the oscillators O81 to O86 provided in the transmitters A1 to A6 that output continuous pulse signals, even if they are made in the same way, due to variations in components such as PUT, capacitors, and resistors, their output signals are As shown in O81 to O86 in the figure, one or both of the pulse width and pulse interval is different from each other, so for example, the transmitter A1. Assuming that A2 operates simultaneously, the pulse signals from the oscillators O81 and O82 are superimposed on the signal line L1 as shown in L1 to L3 in FIG. 5(a), and O8 is applied to Lt2 and L3.
1, O82 pulse signals are sent out separately, and in response, the transistors Try to Tr3 connected to the resistors R1 to R3 in the receiver Re switch to the transistors Try to Tr3 in FIG. 5(b).
Tr1 to Tr are electrically connected to the output lines 11 to 13 as shown in
Since an output voltage corresponding to the current of Tr3 is generated, Tr1 to T
While r3 is conducting at the same time, G1 in FIG. 5(c). G
As shown in 2°G, , gl, the AND circuit G1. G2.
At the same time as G4, gl also conducts, and the inhibition circuit G (~Gj
3 are all prohibited and none of the district relays N1 to N6 operate, but if Trl > Tr2 or Trl,
While only Tr3 is conducting at the same time, g1 to g4 are not conducting and G (or G6 is conducting together with G1 or G2, district relays N1 and N2 operate one after another to maintain self-holding, and transmitters A1 and A2 Displays the district in which the district is located.

Furthermore, even when three or more transmitters A1-80 operate simultaneously, if three or more transistors Tr1-Tr4 conduct at the same time, one of the AND circuits g1-g4 becomes conductive, and the prohibition circuit G (~G≦ are all prohibited, so none of the district relays N1 to N6 operate, but Tr1 to Tr4
As long as only two of them are conductive at the same time, the AND circuit g
1 to g4 are not conductive, and the prohibited circuits G (to G6 are all in a state where they can conduct, and AND circuits 01 to G6 that correspond to the conductive ones are simultaneously conductive and district relays N1 to
The corresponding ones of N6 are operated in sequence, and the transmitters A,
- Areas in which activated items are installed among A6 are displayed in sequence.

If the number of the above-mentioned receiving elements that simultaneously receive the above-mentioned pulse signals is smaller than the number of the above-mentioned selected signal lines due to a fault in the line, AND circuits G1 to G6
Since there is no conduction, it does not indicate any warning area.

In this way, if all transmitters simultaneously send the same pulse signal to a certain number of selected lines, and each transmitter sends the signal to a different combination of lines, it is possible to send multiple signals at the same time. When the transmitter operates, the pulse signal will be sent to a number of lines greater than the number of lines selected above.

In this case, when the receiving element in the receiver simultaneously receives pulse signals through a number of lines greater than the number of lines selected above, all of the prohibition circuits are set to the prohibition state. It is possible to avoid detecting combinations of

However, even if each transmitter is made in the same way, the pulse width and/or pulse interval of the pulse signals sent out from them are always different, and the pulse signals sent out from multiple transmitters always have different pulse widths and/or pulse intervals. The size of the difference between the two changes over time, so in actual fire notification devices, not that many transmitters operate simultaneously, and the above selection is not possible.

There is always a period in which these pulse signals are not received simultaneously through more lines than the number of lines selected, and the pulse signals sent from the same transmitter to multiple selected lines are always synchronized. and received at the same time.
As can be inferred from FIGS. 5(a) to (c), even with the above method, signals from only the same transmitter may be detected simultaneously during a period in which pulse signals from multiple transmitters are not received simultaneously. This makes it possible to display the correct fire district and eliminate erroneous display.

Furthermore, since the number of signal lines selected for transmission in each warning area is limited, this reporting device is less likely to malfunction due to noise such as induced surge voltage from other lines.

As described above, the fire notification device according to the present invention has a simple configuration, requires fewer signal lines, has less risk of malfunction due to noise, and can be used even when transmitters in multiple areas operate at the same time. This has the effect of being able to accurately display the area where the transmitter has operated.

[Brief explanation of the drawing]

Figures 1 and 2 are circuit diagrams partially showing one embodiment of the present invention, and Figures 3 to 5 show the waveform of the pulse signal used in this embodiment and the corresponding operation of each part. FIG. Re...Receiver, R1-R4...Receiving element, L1
~L4...Signal line, A1-A6...Transmitter, 01
~G6゜g1~g4+ GC~Gj3...Gate circuit for selecting the warning area where the transmitter is activated.

Claims (1)

[Claims] 1. A plurality of signal lines, each connected to a receiving element in a receiver, are lined up and pass through a plurality of guarded areas, and in each guarded area, different combinations of these signal lines are used to transmit all signal lines. A transmitter that selects a certain number of lines common to a warning area and simultaneously applies the same continuous pulse signal to each receiving element on each of the selected signal lines, and the pulse that is generated for each transmitter. In addition to connecting signals with different pulse widths and/or pulse intervals, the receiver simultaneously receives the above pulse signals in the same number as the number of signal lines selected in the above receiving elements. In such a case, the alert area in which the transmitter was activated is selected and displayed based on the functions of those elements, and the above-mentioned receiving elements simultaneously transmit the above-mentioned pulse signal in a number different from the number of selected signal lines. A notification device for a fire, etc., characterized in that when a notification is received, no warning area is displayed.